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#!/usr/bin/python# -*- Coding: utf-8 -*-filecount = 300000filesize = 1024import random,timefrom os import systemflush = "sudo su -c 'sync ; echo 3 > /proc/sys/vm/drop_caches'"randfile = open("/dev/urandom","r")print "\ncreate test folder:"starttime = time.time()system("rm -rf test && mkdir test")print time.time() - starttimesystem(flush)print "\ncreate files:"starttime = time.time()for i in xrange(filecount): rand = randfile.read(int(filesize * 0.5 + filesize * random.random())) outfile = open("test/" + unicode(i),"w") outfile.write(rand)print time.time() - starttimesystem(flush)print "\nrewrite files:"starttime = time.time()for i in xrange(int(filecount / 10)): rand = randfile.read(int(filesize * 0.5 + filesize * random.random())) outfile = open("test/" + unicode(int(random.random() * filecount)),"w") outfile.write(rand)print time.time() - starttimesystem(flush)print "\nread linear:"starttime = time.time()for i in xrange(int(filecount / 10)): infile = open("test/" + unicode(i),"r") outfile.write(infile.read());print time.time() - starttimesystem(flush)print "\nread random:"starttime = time.time()outfile = open("/dev/null","w")for i in xrange(int(filecount / 10)): infile = open("test/" + unicode(int(random.random() * filecount)),"r") outfile.write(infile.read());print time.time() - starttimesystem(flush)print "\ndelete all files:"starttime = time.time()system("rm -rf test")print time.time() - starttimesystem(flush)
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